Concrete strength nondestructive test method based on elastic wave

A technology for concrete strength and non-destructive testing, which is used in the analysis of solids using sonic/ultrasonic/infrasonic waves, which can solve the problems of reduced testing efficiency, great influence of structural concrete surface conditions, and decreased ultrasonic wave velocity testing accuracy.

Active Publication Date: 2019-06-25
四川升拓检测技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The compressive test is a destructive test, and can only be cored by concurrent curing test blocks or structures, and cannot be directly carried out on the entity
Rebound method and ultrasonic rebound comprehensive method are widely used non-destructive testing methods, but both methods cannot test the elastic modulus of concrete, and are greatly affected by the surface state of structural concrete.
In addition, the rebound method cannot test the internal strength, the accuracy is poor, and carbonization depth correction is required; the ultrasonic rebound

Method used

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  • Concrete strength nondestructive test method based on elastic wave

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Embodiment 1

[0055] A method for non-destructive testing of concrete strength based on elastic waves, comprising the following steps in sequence:

[0056] S1. Obtain the elastic modulus of the measured concrete member through elastic waves;

[0057] S2, introducing the elastic modulus obtained in step S1 into the known relationship between elastic modulus and compressive strength, and obtaining the compressive strength corresponding to the elastic modulus obtained in step S1;

[0058] The known relationship between elastic modulus and compressive strength is: the known relationship between elastic modulus and compressive strength of a concrete member of the same type as the concrete to be tested.

[0059] This scheme is based on: according to the correlation between the elastic modulus and compressive strength of concrete components, to accurately test the compressive strength of concrete: according to the known relationship between the elastic modulus and compressive strength of the same ...

Embodiment 2

[0074] This embodiment is further limited on the basis of embodiment 1, combined with the above, for V R , the corresponding test method can be obtained by testing the surface wave method; for V P3 , the corresponding test method can be obtained by testing the double-sided transmission method; for V P2 , the corresponding test method can be obtained by testing the single-sided planar method; for V P1 , the corresponding test method can be obtained by testing with a single reflection method, but in the actual implementation, if you want to ensure the accuracy of the wave velocity test corresponding to the corresponding test method, you need to consider: for example, the surface wave method requires the concrete component to be tested to be thick and large, with double The surface penetration method requires the measured object to have two opposite free surfaces, the single-sided planar measurement method requires the surface of the measured object to be flat, and the single re...

Embodiment 3

[0100] This embodiment provides a specific implementation based on computer data processing:

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Abstract

The invention discloses a concrete strength nondestructive test method based on an elastic wave. The method successively comprises the following steps of S1, obtaining the elastic modulus of a concrete member to be tested by the elastic wave; S2, introducing the elastic modulus obtained in the step S1 into a relationship between the known elastic modulus and the compressive strength to obtain thecompressive strength corresponding to the elastic modulus obtained in the step S1, wherein the relationship between the known elastic modulus and the compressive strength is a relationship between theknown elastic modulus of a concrete member having the same type as the tested concrete member and the compressive strength. The method can quickly obtain the concrete strength in the concrete structure.

Description

technical field [0001] The invention relates to the field of concrete material safety detection, in particular to a method for non-destructive detection of concrete strength based on elastic waves. Background technique [0002] Concrete is the most commonly used material for important structural engineering in civil engineering, construction, bridge and tunnel, water conservancy, metallurgy and other industries, and plays a pivotal role in the construction of social infrastructure. However, during the use of concrete, various aging and deterioration phenomena will inevitably occur. If the construction quality is not well guaranteed, the aging and deterioration of the structure will be accelerated, the cost of maintenance and reinforcement will be greatly increased, and the service life of the structure will be seriously reduced. , resulting in social and economic losses. [0003] Concrete compressive strength and elastic modulus are important parameters reflecting concrete ...

Claims

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Application Information

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IPC IPC(8): G01N29/04G01N29/07
Inventor 吴佳晔姜勇张远军罗技明黄伯太杨森李科
Owner 四川升拓检测技术股份有限公司
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